Triangle craft with dim lights traveling low at a high rate of speed with no sound over the Colorado Springs airport.

I was in my back yard sitting down smoking a cigarette. I live on Peterson AFB. I saw triangle shaped craft flying almost overhead. I saw a total of five really dim steady lights. Two where in the rear..two more in the middle..and one at the point of the craft. For a few seconds it was reflecting the lights from the city. It would have flown directly over the AFB/Airport for Colorado Springs. It was traveling on a south to north path. It was traveling at a high rate of speed and I heard no sound from it at all. I didn't really see a color to this craft. There is no moon and a I saw it reflecting the lights from town and the small emitting lights from it has well.